bn tách nhỏ từng bài ra

Anh có làm rồi em hi

\(3\\ M_Y=0,586.29=17\left(\dfrac{g}{mol}\right)\\ M_X=2M_Y=2.17=34\left(\dfrac{g}{mol}\right)\\ 4\\ d_{\dfrac{CO_2}{O_2}}=\dfrac{M_{CO_2}}{O_2}=\dfrac{44}{32}=1,375\\ d_{\dfrac{CH_4}{O_2}}=\dfrac{M_{CH_4}}{O_2}=\dfrac{16}{32}=0,5\)

Vậy: CO₂ nặng gấp 1,375 lần so với O₂

Còn CH₄ chỉ nhẹ bằng một nửa so với O₂ (chỉ nhẹ bằng 0,5 lần)

b, 

\(M_{CO_2}>29\left(44>29\right)\) => CO₂ nặng hơn không khí

\(M_{CH_4}< 29\left(16< 29\right)\) => CH₄ nhẹ hơn không khí

Bài 5:

\(M_{KHÍ.1}=M_{CH_4}.1,625=16.1,625=26\left(\dfrac{g}{mol}\right)\\ M_{KHÍ.2}=M_{CH_4}.0,125=16.0,125=2\left(\dfrac{g}{mol}\right)\\ M_{KHÍ.3}=1,0625.M_{CH_4}=1,0625.16=17\left(\dfrac{g}{mol}\right)\)

BT1 : 

Ta có : \(d_{\dfrac{A}{B}}=\dfrac{M_A}{M_B}=1,8\)

\(\rightarrow M_A=1,8.30=54\) 

BT2 : 

Ta có : \(d_{\dfrac{Y}{SO2}}=\dfrac{M_Y}{M_{SO2}}=0,5\rightarrow M_Y=0,5.64=32\)

mà \(d_{\dfrac{X}{Y}}=\dfrac{M_X}{M_Y}=1,5\rightarrow M_X=1,5.32=48\)

\(1\\ M_X=2.8,5=17\left(\dfrac{g}{mol}\right)\\ 2\\ M_A=29.1,258=36,5\left(\dfrac{g}{mol}\right)\)

a.

\(d_{A\text{/}O_2}=1.375\) \(\Rightarrow M_A=1.375\cdot32=44\left(g\text{/}mol\right)\)

b.

\(d_{B\text{/}kk}=0.586\) \(\Rightarrow M_B=0.586\cdot29=17\left(g\text{/}mol\right)\)

a) \(M_X=19.2=38\left(g/mol\right)\)

`=>` \(d_{X/kk}=\dfrac{38}{29}=1,310345\)

b) \(m_X=0,4.38=15,2\left(g\right)\)

Gọi \(\left\{{}\begin{matrix}n_{O_2}=x\left(mol\right)\\n_{CO_2}=y\left(mol\right)\end{matrix}\right.\)

`=>` \(\left\{{}\begin{matrix}32x+44y=15,2\\x+y=0,4\end{matrix}\right.\Leftrightarrow x=y=0,2\)

\(m_Y=0,1.28+15,2=18\left(g\right)\)

`=>` \(\left\{{}\begin{matrix}\%m_{N_2}=\dfrac{0,1.28}{18}.100\%=15,56\%\\\%m_{O_2}=\dfrac{0,2.32}{18}.100\%=35,56\%\\\%m_{CO_2}=100\%-15,56\%-35,56\%=48,88\%\end{matrix}\right.\)

b) \(M_{hh}=4.10=40\left(g/mol\right)\)

Gọi \(n_{NO_2}=a\left(mol\right)\)

`=>` \(\left\{{}\begin{matrix}m_{hh}=18+46a\left(g\right)\\n_{hh}=0,5+0,1+a=0,6+a\left(mol\right)\end{matrix}\right.\)

`=>` \(M_{hh}=\dfrac{m_{hh}}{n_{hh}}=\dfrac{18+46a}{0,6+a}=40\)

`=> a = 1`

`=> V_{NO_2(đktc)} = 1.22,4 = 22,4 (l)`

a)

\(\dfrac{M_X}{M_{H_2}}=18\\ \Rightarrow M_X=18.2=32\left(\dfrac{g}{mol}\right)\)

`X:O_2`

b)

\(\dfrac{M_Y}{M_{H_2}}=15\\ \Rightarrow M_Y=15.2=30\left(\dfrac{g}{mol}\right)\)

`Y:NO`

c)

\(\dfrac{M_Z}{M_{H_2}}=32\\ \Rightarrow M_Z=32.2=64\left(\dfrac{g}{mol}\right)\)

`Z:SO_2`

d)

\(\dfrac{M_T}{M_{kk}}=1,517\\ \Rightarrow M_T=1,517.29=44\left(\dfrac{g}{mol}\right)\)

`T:CO_2`

e)

\(\dfrac{M_U}{M_{kk}}=2,759\\ \Rightarrow M_U=2,759.29=80\left(\dfrac{g}{mol}\right)\)

`U:SO_3`

1)

$M_X = 1,375.32  = 44(g/mol)$
$M_X = 0,0625.32 = 2(g/mol)$

2)

$M_X = 2,207.29 = 64(g/mol)$

$M_X = 1,172.29 = 34(g/mol)$

3)

$M_X = 17.2 = 34(g/mol)$

Vậy khí X là $H_2S$

4)

a) $M_X = 0,552.29 = 16$
Gọi CTHH của X là $C_xH_y$

Ta có :  $\dfrac{12x}{75} = \dfrac{y}{25} = \dfrac{16}{100}$

Suy ra:  x = 1 ; y = 4

Vậy X là $CH_4$

$CH_4 + 2O_2 \xrightarrow{t^o} CO_ 2+ 2H_2O$
$V_{O_2} = 2V_{CH_4} = 11,2.2 = 22,4(lít)$